CN101658971A - Non-contact arc ignition welding gun for vacuum electric arc welding of hollow cathode - Google Patents
Non-contact arc ignition welding gun for vacuum electric arc welding of hollow cathode Download PDFInfo
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- CN101658971A CN101658971A CN 200910169308 CN200910169308A CN101658971A CN 101658971 A CN101658971 A CN 101658971A CN 200910169308 CN200910169308 CN 200910169308 CN 200910169308 A CN200910169308 A CN 200910169308A CN 101658971 A CN101658971 A CN 101658971A
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- barrel
- welding gun
- hollow cathode
- urceolus
- hollow
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- 238000003466 welding Methods 0.000 title claims abstract description 88
- 238000010891 electric arc Methods 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007747 plating Methods 0.000 claims description 12
- 229910052715 tantalum Inorganic materials 0.000 claims description 10
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 18
- 239000000306 component Substances 0.000 description 12
- 229910052786 argon Inorganic materials 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000005476 soldering Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005495 cold plasma Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Abstract
The invention belongs to welding technology and relates to a non-contact arc ignition welding gun capable of realizing stable arc ignition and used for vacuum electric arc welding of a hollow cathode.A hollow cathode of the welding gun is directly inserted into central holes of an outer barrel support and an inner barrel support; an outer barrel component of the welding gun comprises an outer barrel water inlet pipe, an outer barrel water outlet pipe, an outer barrel connecting terminal, a hollow barrel wall and an outer base plate; an inner barrel component of the welding gun comprises an air inlet pipe, an inner barrel connecting terminal, an inner barrel water inlet pipe, an inner barrel water outlet pipe, a barrel wall and an inner base plate; the outer barrel component and the innerbarrel component of the welding gun are separated through an insulating bush; and an arc ignition auxiliary circuit is accessed between the outer barrel connecting terminal and the inner barrel connecting terminal. The hollow cathode is arranged in a closed system between the outer barrel and the inner barrel of the welding gun, thereby preventing the hollow cathode from being polluted by metal vapor due to exposing in electric arc; and the welding gun adopts a bi-channel water cooling system, therefore, the cooling effect is good, the working reliability of the electric arc is high, the service life of the welding gun and the hollow cathode is long, and the stable work of the welding control system is ensured.
Description
Technical field
The invention belongs to solder technology, relate to a kind of noncontact striking welding gun that is used for Arc in Hollow Cathode Vacuum Arc Welding of realizing stablizing striking.
Background technology
(Hollow Cathode Vacuum Arc Welding HCVAW) is the welding technique of a novelty to the Arc in Hollow Cathode Vacuum Arc Welding technology.Vacuum arc is a kind of thermal source of local heat, and under the little current condition, electric arc is " taper " divergent shape, can be used as the vacuum brazing that local heat source carries out small size, has a wide range of applications in the manufacturing of aero-engine hot-end component with in repairing; Under the big current condition, electric arc is " column ", and energy accumulation is good, can be used as the melting welding thermal source, carries out various infusibilities, the high-quality welding of easy oxidation metal under vacuum condition.
The hollow cathode welding gun is the core component in the Arc in Hollow Cathode Vacuum Arc Welding method, the quality of its performance, and direct relation the stability and the reliability of vacuum arc burning, influences the quality of vacuum arc welding.
The Starting Arc in Hollow Cathode Vacuum Arc Welding method mainly contains three kinds: contacting ignition arc, noncontact heating striking and high-frequency arc strike.In the hollow cathode arc discharge, the fragile negative electrode of contacting ignition arc, its particle falls into weld seam, easily causes to be mingled with; Simultaneously, high in the electric field ratio air in a vacuum, might in electrode material steam, form electric arc.During contacting ignition arc, if the effect of welding gun cooling is bad, or vacuum is low in the vacuum chamber, and discharge just produces in positions such as welding gun rifle body, instrument leads possibly, promptly produces so-called " cold plasma ", and this cold plasma has great destructiveness.Compare with the contacting ignition arc method, the noncontact striking has advantages such as success rate height, hollow cathode life-span length.
Chinese patent " double concave matrix hollow cathode welding gun " (publication number CN2351236) discloses a kind of double concave matrix hollow cathode welding gun (see figure 1), on its rifle body 16, be connected to water inlet pipe 11, outlet pipe 12, tracheae 13, hollow cathode 101 is equipped with in its rifle body 16 bottoms, at the head of negative electrode 101 narrow meshed double concave diaphragm 103 is housed; Around negative electrode 101, also be provided with heating element heater in addition.Owing to narrow meshed double concave diaphragm is housed in negative electrode inside, electric arc to be compressed, arc energy density can satisfy the requirement of weld seam fusing, and negative electrode can be by electric arc penetration or distortion; Heating element heater makes negative electrode electron gain heat emission ability, the repeatedly starting the arc.But because in the welding gun structure that relates in this patent, the element that adds hot hollow cathode can not be removed after striking, the hyperthermia radiation of electric arc work hollow core negative electrode causes the damage of heating element heater easily; Hollow cathode is exposed in the electric arc steam simultaneously, is vulnerable to by the welding metal material steam contamination, makes that hollow cathode welding gun performance reduces, the lost of life of hollow cathode.
Summary of the invention
The purpose of this invention is to provide a kind of performance that improves the hollow cathode welding gun, prolong hollow cathode a kind of noncontact striking welding gun that is used for Arc in Hollow Cathode Vacuum Arc Welding in service life.Technical solution of the present invention is that welding gun comprises: cartridge module, insulation sleeve in hollow cathode, urceolus bearing, inner core bearing, welding gun outer barrel component, the welding gun.Hollow cathode directly is inserted on the centre bore of urceolus bearing and inner core bearing; The urceolus bearing places on the centre bore of welding gun outer barrel component Outer Bottom Plating, and the inner core bearing is installed on the following centre bore of cartridge module middle line strake in the welding gun.The welding gun outer barrel component comprises, hollow barrel, Outer Bottom Plating, urceolus water inlet pipe, urceolus outlet pipe and urceolus binding post, the urceolus water inlet pipe is by the hole of hollow barrel top, be deep in the interlayer of hollow barrel, the urceolus outlet pipe places top, hollow barrel right side, the cavity of urceolus water inlet pipe, urceolus outlet pipe and hollow barrel forms circulation waterway, urceolus binding post and the welding of hollow barrel outer wall; Cartridge module comprises in the welding gun: barrel, air inlet pipe, inner core binding post and inner core water inlet pipe and inner core outlet pipe, the barrel top has the hole that is installed into tracheae and inner core water inlet pipe, the top, right side that the inner core outlet pipe places barrel, the inner chamber that inner core water inlet pipe and inner core outlet pipe and barrel and inner bottom plating form constitutes circulation waterway, air inlet pipe is passed the hole on barrel top and the last centre bore of inner bottom plating joins, the outer wall welding of inner core binding post and barrel; Separate by insulation sleeve between the cartridge module in welding gun outer barrel component and the welding gun; Insert arc ignition auxiliary circuit between urceolus binding post and the inner core binding post, arc ignition auxiliary circuit is made up of transformer, relay, the secondary urceolus binding post and the inner core binding post of being connected to respectively of transformer, and the elementary of transformer joined through relay and power supply.
Described hollow cathode is the hollow pipe that the tantalum paper tinsel rolls into, and rolling the number of plies is 3～4 layers, and the length of hollow cathode is 40～80mm, and the hollow cathode bore is 2mm～6mm.
Advantage that the present invention has and beneficial effect:
The present invention adopts hollow cathode to place the closed system between the cartridge module in welding gun outer barrel component and the welding gun, has avoided hollow cathode to be exposed in the electric arc and by the pollution of metallic vapour; Cartridge module is furnished with the recirculated cooling water road respectively in welding gun outer barrel component and the welding gun, thoroughly solved the easy down problem that produces " cold plasma " of vacuum condition, good cooling results, electric arc functional reliability height, welding gun and hollow cathode life-span are long, have guaranteed the steady operation of welding control system; Welding gun structure of the present invention can
To realize that (6～8A) noncontact striking has been avoided causing the negative electrode burning because of the striking electric current is excessive, has improved cathode life under the little current condition; The straight tube hollow cathode that the tantalum paper tinsel rolls into is simple in structure, easy to manufacture, and cost is low, is easy to realize the engineering application.
Description of drawings
Fig. 1 is the prior art structural representation, and wherein, A is the body of prior art, and B is that the negative electrode head is equipped with narrow meshed double concave diaphragm;
Fig. 2 is a structural representation of the present invention;
Fig. 3 is a testing equipment block diagram of the present invention.
The specific embodiment
The hollow cathode 3 of welding gun directly is inserted on the centre bore of urceolus bearing 2 and inner core bearing 4; Urceolus bearing 2 places on the centre bore of welding gun outer barrel component Outer Bottom Plating 20, and inner core bearing 4 is installed on the following centre bore of cartridge module middle line strake 19 in the welding gun.The welding gun outer barrel component comprises, hollow barrel 5, Outer Bottom Plating 20, urceolus water inlet pipe 6, urceolus outlet pipe 14 and urceolus binding post 13, urceolus water inlet pipe 6 is by the hole of hollow barrel 5 tops, be deep in the interlayer of hollow barrel 5, urceolus outlet pipe 14 places top, hollow barrel 5 right sides, urceolus water inlet pipe 6, urceolus outlet pipe 14 form circulation waterway with the cavity of hollow barrel 5, urceolus binding post 13 and hollow barrel 5 outer walls welding; Cartridge module comprises in the welding gun: barrel 8, air inlet pipe 10, inner core binding post 12 and inner core water inlet pipe 9 and inner core outlet pipe 11, barrel 8 tops have the hole that is installed into tracheae 10 and inner core water inlet pipe 9, the top, right side that inner core outlet pipe 11 places barrel 8, inner core water inlet pipe 9 and inner core outlet pipe 11 constitute circulation waterway with the inner chamber that barrel 8 and inner bottom plating 19 form, air inlet pipe 10 is passed the hole on barrel 8 tops and the last centre bore of inner bottom plating 19 joins, and inner core binding post 12 welds with the outer wall of barrel 8; Separate by insulation sleeve 7 between the cartridge module in welding gun outer barrel component and the welding gun; Insert arc ignition auxiliary circuit 15 between urceolus binding post 13 and the inner core binding post 12, arc ignition auxiliary circuit is made up of transformer 16, relay 17, the secondary urceolus binding post 13 and the inner core binding post 12 of being connected to respectively of transformer 16, the elementary and relay 17 of transformer 16, power supply join and form the loop.
Described hollow cathode 3 is the hollow pipe that the tantalum paper tinsel rolls into, and rolling the number of plies is 3～4 layers, and the length of hollow cathode is 40～80mm, and the hollow cathode bore is 2mm～6mm.
The present invention passes through the AC transformer on-load voltage in the formed series resistance of cartridge module two ends in welding gun outer barrel component, urceolus bearing 2, hollow cathode 3, inner core bearing 4, welding gun, realization is to the integral body heating of hollow cathode 3, guarantee that hollow cathode can be heated to sufficient temp, form stable cathode primary electron emission.Arc process is: before the striking, gap M (referring to Fig. 2) between hollow cathode 3 and the run-on tab 1 is transferred to 1～2mm, air inlet pipe 10 input argon gas (range of flows 5～20ml/min), connect the source of welding current, source of welding current output floating voltage, relay 17 adhesives, transformer 16 work, be added in the formed current loop of cartridge module two ends in welding gun outer barrel component, urceolus bearing 2, hollow cathode 3, inner core bearing 4, the welding gun after the step-down, make whole hollow cathode 3 be subjected to the heating of low-voltage, high-current; After the temperature of hollow cathode 3 reaches the temperature conditions of electronics emission, working gas (argon gas) arrives hollow cathode 3 by air inlet pipe 10, thermoelectron by wall emission in the negative electrode, the bump gas molecule, produce bump ionization or make gas molecule reach foment, the hollow cathode inwall begins to be subjected to the bombardment of gas ion, negative electrode is heated to very high-temperature, the hollow cathode inwall has had the energy of enough generation thermionic emission, this moment, the hollow cathode inner chamber just formed plasma, produced stable arc discharge (this process was generally 15～20 seconds).The arc voltage in arc stability when burning is lower than 50 volts, detects the voltage signal between welding gun and the workpiece, if be lower than 50 volts then provide striking work and finish signal, and relay 17 disconnections, arc ignition auxiliary circuit is cut off, and striking work is finished.According to materials to be welded, actual condition of structure, regulate parameters such as arc length, electric current and argon flow amount, just can begin to carry out the welding job of material or structure.
Embodiment
(initial depression is 1.5 * 10 on vacuum arc soldering test equipment as shown in Figure 3
-2Pa, the source of welding current are Maxtar150 type welding machine), implemented the noncontact striking experiment of welding gun among the present invention:
Embodiment one
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 3 layers, and the length of hollow cathode is 40mm, and the hollow cathode bore is 2mm.In the striking parameter: arc current 6A, striking arc length (clearance distance between hollow cathode end and the welded piece) 1mm, argon flow amount 5ml/min has obtained stable striking, and has carried out soldering test;
Embodiment two
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 3 layers, and the length of hollow cathode is 40mm, and the hollow cathode bore is 2mm.In the striking parameter: arc current 6A, striking arc length 2mm, argon flow amount 5ml/min has obtained stable striking, and has carried out soldering test;
Embodiment three
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 4 layers, and the length of hollow cathode is 60mm, and the hollow cathode bore is 4mm.In the striking parameter: arc current 6A, striking arc length 1mm, argon flow amount 5ml/min has obtained stable striking, and has carried out soldering test;
Embodiment four
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 4 layers, and the length of hollow cathode is 60mm, and the hollow cathode bore is 4mm.In the striking parameter: arc current 6A, striking arc length 1mm, argon flow amount 10ml/min has obtained stable striking, and has carried out soldering test;
Embodiment five
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 4 layers, and the length of hollow cathode is 80mm, and the hollow cathode bore is 3mm.In the striking parameter: arc current 8A, striking arc length 1mm, argon flow amount 10ml/min has obtained stable striking, and has carried out soldering test;
Embodiment six
The tantalum paper tinsel rolls into hollow pipe, and rolling the number of plies is 4 layers, and the length of hollow cathode is 80mm, and the hollow cathode bore is 6mm.In the striking parameter: arc current 8A, striking arc length 1mm, argon flow amount 20ml/min has obtained stable striking, and has carried out soldering test.
Result of the test: the work of hollow cathode continous-stable is more than 3 hours, life-span reaches 30 hours, " cold plasma " phenomenon do not occur, the present invention's " a kind of noncontact striking welding gun that is used for Arc in Hollow Cathode Vacuum Arc Welding " can carry out the engineering of vacuum arc welding and use.
Claims (2)
1. noncontact striking welding gun that is used for Arc in Hollow Cathode Vacuum Arc Welding, comprise: hollow cathode, water inlet pipe, outlet pipe, air inlet pipe and welding gun rifle body, it is characterized in that hollow cathode (3) directly is inserted on the centre bore of urceolus bearing (2) and inner core bearing (4); Urceolus bearing (2) places on the centre bore of welding gun outer barrel component Outer Bottom Plating (20), and inner core bearing (4) is installed on the following centre bore of cartridge module middle line strake (19) in the welding gun; The welding gun outer barrel component comprises, hollow barrel (5), Outer Bottom Plating (20), urceolus water inlet pipe (6), urceolus outlet pipe (14) and urceolus binding post (13), urceolus water inlet pipe (6) is by the hole of hollow barrel (5) top, be deep in the interlayer of hollow barrel (5), urceolus outlet pipe (14) places top, hollow barrel (5) right side, urceolus water inlet pipe (6), urceolus outlet pipe (14) form circulation waterway with the cavity of hollow barrel (5), urceolus binding post (13) and the welding of hollow barrel (5) outer wall; Cartridge module comprises in the welding gun: barrel (8), air inlet pipe (10), inner core binding post (12) and inner core water inlet pipe (9) and inner core outlet pipe (11), barrel (8) top has the hole that is installed into tracheae (10) and inner core water inlet pipe (9), inner core outlet pipe (11) places the top, right side of barrel (8), inner core water inlet pipe (9) and inner core outlet pipe (11) constitute circulation waterway with the inner chamber that barrel (8) and inner bottom plating (19) form, air inlet pipe (10) is passed the hole on barrel (8) top and the last centre bore of inner bottom plating (19) joins, and inner core binding post (12) welds with the outer wall of barrel (8); Separate by insulation sleeve (7) between the cartridge module in welding gun outer barrel component and the welding gun; Insert arc ignition auxiliary circuit (15) between urceolus binding post (13) and the inner core binding post (12), arc ignition auxiliary circuit is made up of transformer (16), relay (17), the secondary of transformer (16) is connected to respectively between urceolus binding post (13) and the inner core binding post (12), and the elementary of transformer (16) joined through relay (17) and power supply.
2. a kind of noncontact striking welding gun that is used for Arc in Hollow Cathode Vacuum Arc Welding according to claim 1, it is characterized in that: the hollow pipe that described hollow cathode (3) rolls into for the tantalum paper tinsel, rolling the number of plies is 3～4 layers, the length of hollow cathode is 40～80mm, and the hollow cathode bore is 2mm～6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101693088A CN101658971B (en) | 2009-08-25 | 2009-08-25 | Non-contact arc ignition welding gun for vacuum electric arc welding of hollow cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101693088A CN101658971B (en) | 2009-08-25 | 2009-08-25 | Non-contact arc ignition welding gun for vacuum electric arc welding of hollow cathode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101658971A true CN101658971A (en) | 2010-03-03 |
| CN101658971B CN101658971B (en) | 2012-04-18 |
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| CN2009101693088A Active CN101658971B (en) | 2009-08-25 | 2009-08-25 | Non-contact arc ignition welding gun for vacuum electric arc welding of hollow cathode |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397245A (en) * | 2015-12-01 | 2016-03-16 | 黑龙江工程学院 | Active hollow-cathode vacuum electric arc welding device and method |
| CN105436672A (en) * | 2016-01-12 | 2016-03-30 | 北京工业大学 | Hollow cathode annular negative-pressure electric arc welding method |
| CN106735763A (en) * | 2017-03-14 | 2017-05-31 | 东莞市金龙珠宝首饰有限公司 | A kind of gas welding welding gun |
| CN108286038A (en) * | 2018-01-23 | 2018-07-17 | 温州职业技术学院 | Cold cathode arc plasma source and non-contact striking method |
| CN111344097A (en) * | 2017-11-08 | 2020-06-26 | 弗罗纽斯国际有限公司 | Method for contactless ignition of an arc and welding current source for carrying out an ignition process |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2351236Y (en) * | 1998-11-27 | 1999-12-01 | 中国航天工业总公司第七○三研究所 | Double-concave diaphragm hollow cathode welding gun |
| US6441554B1 (en) * | 2000-11-28 | 2002-08-27 | Se Plasma Inc. | Apparatus for generating low temperature plasma at atmospheric pressure |
| CN1175940C (en) * | 2003-04-28 | 2004-11-17 | 西安交通大学 | Hollow cathode central axial powder-feeding plasma spraying gun |
-
2009
- 2009-08-25 CN CN2009101693088A patent/CN101658971B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397245A (en) * | 2015-12-01 | 2016-03-16 | 黑龙江工程学院 | Active hollow-cathode vacuum electric arc welding device and method |
| CN105436672A (en) * | 2016-01-12 | 2016-03-30 | 北京工业大学 | Hollow cathode annular negative-pressure electric arc welding method |
| CN105436672B (en) * | 2016-01-12 | 2017-12-08 | 北京工业大学 | A kind of hollow cathode ring-type negative pressure arc-welding method |
| CN106735763A (en) * | 2017-03-14 | 2017-05-31 | 东莞市金龙珠宝首饰有限公司 | A kind of gas welding welding gun |
| CN111344097A (en) * | 2017-11-08 | 2020-06-26 | 弗罗纽斯国际有限公司 | Method for contactless ignition of an arc and welding current source for carrying out an ignition process |
| CN111344097B (en) * | 2017-11-08 | 2021-09-03 | 弗罗纽斯国际有限公司 | Method for contactless ignition of an arc and welding current source for carrying out an ignition process |
| CN108286038A (en) * | 2018-01-23 | 2018-07-17 | 温州职业技术学院 | Cold cathode arc plasma source and non-contact striking method |
| CN108286038B (en) * | 2018-01-23 | 2019-09-10 | 温州职业技术学院 | Cold cathode arc plasma source and non-contact striking method |
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| CN101658971B (en) | 2012-04-18 |
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